Brachial plexus!!!
“Erb-Duchenne palsy, Erb-Charcot paralysis, Erb's point, Erb-Westphal symptom, Erb's spot”
German neurologist Wilhelm Heinrich Erb (1840–1921)
#MedTwitter #neurotwitter #EndNeurophobia #tweetorials
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“Erb-Duchenne palsy, Erb-Charcot paralysis, Erb's point, Erb-Westphal symptom, Erb's spot”
German neurologist Wilhelm Heinrich Erb (1840–1921)
#MedTwitter #neurotwitter #EndNeurophobia #tweetorials
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Components
“Ready To Drink Cold Beer”
Root (5): C5-T1
Trunk (3): upper, middle, lower
Division (6): anterior & posterior from each of the trunks
Cord (3): lateral, posterior, medial
Branch (5)
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“Ready To Drink Cold Beer”
Root (5): C5-T1
Trunk (3): upper, middle, lower
Division (6): anterior & posterior from each of the trunks
Cord (3): lateral, posterior, medial
Branch (5)
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How are roots formed?
“formed by the anterior (ventral) rami of C5 to T1 spinal nerves”
Extent
- interscalene triangle (bounded by anterior scalene and middle scalene)
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“formed by the anterior (ventral) rami of C5 to T1 spinal nerves”
Extent
- interscalene triangle (bounded by anterior scalene and middle scalene)
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How do roots mix to form trunks?
C5 + C6 = upper trunk
- Erb’s point: confluence of C5&C6 at upper trunk
C7 = middle trunk
C8 + T1 = lower trunk
Extent
- interscalene triangle to supraclavicular space of posterior triangle
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C5 + C6 = upper trunk
- Erb’s point: confluence of C5&C6 at upper trunk
C7 = middle trunk
C8 + T1 = lower trunk
Extent
- interscalene triangle to supraclavicular space of posterior triangle
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How do trunks divide to form divisions?
Each trunk splits into anterior and posterior divisions just behind and above the clavicle
Extent
- around and within cervico-axillary canal or apex of axilla
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Each trunk splits into anterior and posterior divisions just behind and above the clavicle
Extent
- around and within cervico-axillary canal or apex of axilla
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How do divisions form cords?
Post divisions of all 3 trunks= posterior cord (C5-T1)
Ant divisions of upper&middle trunks= lateral cord (C5-C7)
Ant division of lower trunks= medial cord (C8-T1)
*cords are named according to their relation to the 2nd part of axillary artery
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Post divisions of all 3 trunks= posterior cord (C5-T1)
Ant divisions of upper&middle trunks= lateral cord (C5-C7)
Ant division of lower trunks= medial cord (C8-T1)
*cords are named according to their relation to the 2nd part of axillary artery
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How do branches arise from brachial plexus?
from cords and from divisions
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from cords and from divisions
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How to draw a simple brachial plexus?
1st: roots
2nd: 3 letter Y’s
3rd: 2 letter E’s
4th: 1 letter X
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1st: roots
2nd: 3 letter Y’s
3rd: 2 letter E’s
4th: 1 letter X
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5th: rule of 3
a. 3 nerves from roots
b. 2 (exception) from trunk
c. 3 from each cord
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a. 3 nerves from roots
b. 2 (exception) from trunk
c. 3 from each cord
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Nerves from brachial plexus
Root, trunk, cord, and terminal branches
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Root, trunk, cord, and terminal branches
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Root branches
“PLeaseD”
Phrenic (C3-C5)
Long thoracic nerve (C5-C7)
Dorsal scapular nerve (C4-C5)
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“PLeaseD”
Phrenic (C3-C5)
Long thoracic nerve (C5-C7)
Dorsal scapular nerve (C4-C5)
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Trunk branches
Subclavius (C5-C6)
Suprascapular (C5-C6)
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Subclavius (C5-C6)
Suprascapular (C5-C6)
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Cord branches
Lateral cord – Look Miss Look
Medial cord – M4U
Posterior cord – ULTRA
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Lateral cord – Look Miss Look
Medial cord – M4U
Posterior cord – ULTRA
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Lateral cord branches
“Look Miss Look”
Lateral pectoral nerve (C5-C7)
Musculocutaneous nerve (C5-C7)
Lateral root of median nerve (C5-C7)
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“Look Miss Look”
Lateral pectoral nerve (C5-C7)
Musculocutaneous nerve (C5-C7)
Lateral root of median nerve (C5-C7)
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Medial cord branches
“M4U”
Medial Pectoral (C8-T1)
Medial cutaneous nerve of arm (C8-T1)
Medial cutaneous nerve of forearm (C8-T1)
Median root of median (C8-T1)
Ulnar (C7-T1)
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“M4U”
Medial Pectoral (C8-T1)
Medial cutaneous nerve of arm (C8-T1)
Medial cutaneous nerve of forearm (C8-T1)
Median root of median (C8-T1)
Ulnar (C7-T1)
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Posterior cord branches
“ULTRA”
Upper Subscapular (C5-C6)
Lower Subscapular (C5-C6)
Thoracodorsal nerve (C6-C8)
Radial (C5-T1)
Axillary (C5-C6)
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“ULTRA”
Upper Subscapular (C5-C6)
Lower Subscapular (C5-C6)
Thoracodorsal nerve (C6-C8)
Radial (C5-T1)
Axillary (C5-C6)
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Terminal branches
“3 musketeers assassinated 5 rats, 5 mice and 2 unicorns!”
3 musketeers: Musculocutaneous nerve(C5, C6, C7)
Assasinated: Axillary nerve(C5-C6)
5 rats: Radial nere(C5, C6, C7, C8, T1)
5 mice: Median nerve(C5, C6, C7, C8, T1)
2 unicorns: Ulnar nerve(C8, T1)
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“3 musketeers assassinated 5 rats, 5 mice and 2 unicorns!”
3 musketeers: Musculocutaneous nerve(C5, C6, C7)
Assasinated: Axillary nerve(C5-C6)
5 rats: Radial nere(C5, C6, C7, C8, T1)
5 mice: Median nerve(C5, C6, C7, C8, T1)
2 unicorns: Ulnar nerve(C8, T1)
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Summary – mnemonic
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Summary – table
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Conditions
a. Erb & Klumpke palsy
b. Thoracic outlet syndrome
c. Winged scapula
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a. Erb & Klumpke palsy
b. Thoracic outlet syndrome
c. Winged scapula
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Erb & Klumpke palsy
Erb – upper trunk
vs
Klumpke – lower trunk
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Erb – upper trunk
vs
Klumpke – lower trunk
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Thoracic outlet syndrome
Compression of lower trunk (same as Klumpke) & subclavian vessels
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Compression of lower trunk (same as Klumpke) & subclavian vessels
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Winged scapula
Medial scapular winging
- long thoracic nerve dysfunction
- serratus anterior muscle weakness
Lateral scapular winging
- spinal accessory nerve dysfunction
- trapezius muscle weakness
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Medial scapular winging
- long thoracic nerve dysfunction
- serratus anterior muscle weakness
Lateral scapular winging
- spinal accessory nerve dysfunction
- trapezius muscle weakness
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NeuroTeach - Content
The blog contains all the threads and videos.
neuronland.blogspot.com
Have a great day!
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The blog contains all the threads and videos.
neuronland.blogspot.com
Have a great day!
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